﻿/******************************************************************************************************
Copyright (c) 2014 Steven Giacomelli (stevegiacomelli@gmail.com)

Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify,
merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies
or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************************************/

namespace SharpGeo
{
    /// <summary>
    /// Provides the rendering algorithm hints on how to blend the layers. Adapted from http://dev.w3.org/SVG/modules/compositing/publish/
    /// </summary>
    public enum BlendingMode
    {
        /// <summary>
        /// The source color replaces the destination color.
        /// </summary>
        Normal,

        /// <summary>
        /// The source color is multiplied by the destination color and replaces the destination. The resultant color is always at least as dark as either the source or destination color.
        /// </summary>
        Multiply,

        /// <summary>
        /// The source and destination colors are complemented, multiplied and the resultant color replaces the destination. The resultant color is always at least as light as either the source or destination colour.
        /// </summary>
        Screen,

        /// <summary>
        /// The resultant color is the darker of source or destination colors. If the source is darker, it replaces the destination. Otherwise, the destination is preserved.
        /// </summary>
        Darken,

        /// <summary>
        /// The resultant color is the lighter of source or destination colors. If the source is lighter, it replaces the destination. Otherwise, the destination is preserved.
        /// </summary>
        Lighten
    }
}